An external force refers to any force acting on an object that originates from a source outside the system being considered. In physics, a system can be a single object, a collection of objects, or any defined portion of the universe under study.
Key points about external forces:
Origin: External forces originate from sources outside the system being analyzed. These forces can come from various sources, such as physical contact with another object, gravitational pull from external bodies, electromagnetic interactions, or applied forces by external agents.
Effect: External forces cause changes in the motion, shape, or state of an object or system. They can accelerate, decelerate, rotate, or deform an object depending on their magnitude, direction, and point of application.
Interaction with Internal Forces: External forces interact with internal forces within a system. Internal forces arise from interactions between components within the system and can balance or oppose external forces.
Newton’s Laws of Motion: External forces play a crucial role in Newton’s laws of motion, particularly the first law (inertia), the second law (force equals mass times acceleration), and the third law (action and reaction).
